Generic Black 1" Inside Diameter Oval Ring Lobster Clasp for Strap or Dog Collar Buckle Pack of 10 Inside swivel tail oval ring diameter:1". Lobster clasp total Length:1.88". Snap opening mouth maximum size about:0.3".The eye hole diameter:0.33". Lobster all kinds of purse or bag strap connector. Full 360 degree swivel eye helps prevent tangles.